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util: implement R9G9B9E5 pack and unpack functions

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softpipe and llvmpipe support done (sampler only).

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák 2011-04-26 02:29:00 +02:00
parent 1da44f5923
commit 349184be36
1 changed files with 82 additions and 5 deletions
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87
src/gallium/auxiliary/util/u_format_other.c
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@ -28,6 +28,7 @@
#include "u_math.h"
#include "u_format_other.h"
#include "../../../mesa/main/rgb9e5.h"
void
@ -35,7 +36,23 @@ util_format_r9g9b9e5_float_unpack_rgba_float(float *dst_row, unsigned dst_stride
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
unsigned x, y;
for(y = 0; y < height; y += 1) {
float *dst = dst_row;
const uint8_t *src = src_row;
for(x = 0; x < width; x += 1) {
uint32_t value = *(const uint32_t *)src;
#ifdef PIPE_ARCH_BIG_ENDIAN
value = util_bswap32(value);
#endif
rgb9e5_to_float3(value, dst);
dst[3] = 1; /* a */
src += 4;
dst += 4;
}
src_row += src_stride;
dst_row += dst_stride/sizeof(*dst_row);
}
}
void
@ -43,14 +60,34 @@ util_format_r9g9b9e5_float_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride
const float *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
unsigned x, y;
for(y = 0; y < height; y += 1) {
const float *src = src_row;
uint8_t *dst = dst_row;
for(x = 0; x < width; x += 1) {
uint32_t value = float3_to_rgb9e5(src);
#ifdef PIPE_ARCH_BIG_ENDIAN
value = util_bswap32(value);
#endif
*(uint32_t *)dst = value;
src += 4;
dst += 4;
}
dst_row += dst_stride;
src_row += src_stride/sizeof(*src_row);
}
}
void
util_format_r9g9b9e5_float_fetch_rgba_float(float *dst, const uint8_t *src,
unsigned i, unsigned j)
{
uint32_t value = *(const uint32_t *)src;
#ifdef PIPE_ARCH_BIG_ENDIAN
value = util_bswap32(value);
#endif
rgb9e5_to_float3(value, dst);
dst[3] = 1; /* a */
}
@ -59,7 +96,27 @@ util_format_r9g9b9e5_float_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_str
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
unsigned x, y;
float p[3];
for(y = 0; y < height; y += 1) {
uint8_t *dst = dst_row;
const uint8_t *src = src_row;
for(x = 0; x < width; x += 1) {
uint32_t value = *(const uint32_t *)src;
#ifdef PIPE_ARCH_BIG_ENDIAN
value = util_bswap32(value);
#endif
rgb9e5_to_float3(value, p);
dst[0] = float_to_ubyte(p[0]); /* r */
dst[1] = float_to_ubyte(p[1]); /* g */
dst[2] = float_to_ubyte(p[2]); /* b */
dst[3] = 255; /* a */
src += 4;
dst += 4;
}
src_row += src_stride;
dst_row += dst_stride/sizeof(*dst_row);
}
}
@ -68,7 +125,27 @@ util_format_r9g9b9e5_float_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_strid
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
unsigned x, y;
float p[3];
for(y = 0; y < height; y += 1) {
const uint8_t *src = src_row;
uint8_t *dst = dst_row;
for(x = 0; x < width; x += 1) {
uint32_t value;
p[0] = ubyte_to_float(src[0]);
p[1] = ubyte_to_float(src[1]);
p[2] = ubyte_to_float(src[2]);
value = float3_to_rgb9e5(p);
#ifdef PIPE_ARCH_BIG_ENDIAN
value = util_bswap32(value);
#endif
*(uint32_t *)dst = value;
src += 4;
dst += 4;
}
dst_row += dst_stride;
src_row += src_stride/sizeof(*src_row);
}
}